Mortgage Points Calculator
Print| Upfront Points Cost ($) | $0.00 |
| Monthly Payment Savings | $0.00 / mo |
Buying Mortgage Discount Points allows homebuyers and refinancers to lower their monthly mortgage payment by paying upfront cash at closing to permanent buy down their interest rate. One mortgage point costs 1% of your total loan amount (e.g., $3,500 on a $350,000 mortgage) and typically reduces your interest rate by 0.25% (25 basis points). Our free Mortgage Points Calculator computes your upfront cost, monthly payment savings, lifetime interest savings, and exact break-even month—helping you determine whether buying points makes financial sense for your timeline.
Whether you are evaluating 1 point, 2 points, or fractional points, read on for discount point formulas, break-even comparison tables, and step-by-step calculation guides.
How Mortgage Discount Points Are Calculated
Evaluating discount points involves calculating upfront cost, monthly payment savings, and break-even duration:
1. Upfront Cost of Mortgage Points Formula:
Upfront Points Cost = Mortgage Loan Principal × (Number of Points / 100)
2. Rate Buy-Down & Monthly Payment Savings Formula:
New Interest Rate (%) = Baseline Interest Rate - (Number of Points × Rate Reduction Per Point)
Monthly Savings = Baseline Monthly P&I Payment - Bought-Down Monthly P&I Payment
3. Break-Even Period Formula (Months & Years):
Break-Even Period (Months) = Total Upfront Points Cost / Monthly Payment Savings
Break-Even Period (Years) = Break-Even Period (Months) / 12
Mortgage Discount Points Break-Even Reference Table
The table below presents upfront costs, monthly savings, and break-even timelines for buying points on a $400,000 30-year fixed mortgage at a 6.50% baseline interest rate ($2,528.27/month P&I):
| Points Purchased | Upfront Cost (1% per Point) | Bought-Down Interest Rate | New Monthly P&I Payment | Monthly Savings (Break-Even) |
|---|---|---|---|---|
| 0.50 Point | $2,000 upfront | 6.375% (-0.125%) | $2,495.66 / mo | $32.61 / mo (61.3 Mos / 5.1 Yrs) |
| 1.00 Point | $4,000 upfront | 6.250% (-0.250%) | $2,463.21 / mo | $65.06 / mo (61.5 Mos / 5.1 Yrs) |
| 1.50 Points | $6,000 upfront | 6.125% (-0.375%) | $2,430.93 / mo | $97.34 / mo (61.6 Mos / 5.1 Yrs) |
| 2.00 Points | $8,000 upfront | 6.000% (-0.500%) | $2,398.20 / mo | $130.07 / mo (61.5 Mos / 5.1 Yrs) |
Step-by-Step Calculation Example
A buyer takes out a $300,000 30-year mortgage at a baseline rate of 6.50% ($1,896.20/month P&I). They consider buying 1 discount point ($3,000 upfront) to reduce their rate to 6.25% ($1,847.16/month P&I).
Step 1: Calculate upfront cost of 1 point
Cost of 1 Point = $300,000 × 0.01 = $3,000.00
Step 2: Calculate monthly payment savings
Monthly Savings = $1,896.20 - $1,847.16 = $49.04 per month
Step 3: Calculate break-even timeline in months and years
Break-Even Period = $3,000 / $49.04 = 61.2 Months (5.1 Years)
Total 30-Year Net Interest Saved = ($49.04 × 360) - $3,000 = $14,654.40
Result Summary:
If the buyer stays in the home longer than 5.1 years (61 months), buying 1 discount point generates a net profit of $14,654.40 in interest savings.
Frequently Asked Questions (FAQ)
What is the difference between discount points and origination points?
Discount points are optional upfront fees paid directly to buy down your interest rate. Origination points are mandatory fees charged by lenders to cover loan processing, underwriting, and administrative overhead.
When is buying mortgage discount points NOT worth it?
Buying points is not worth it if you plan to sell the property or refinance your mortgage before reaching the break-even point (typically 5 years), because you will not have recouped your upfront cash investment.
Are mortgage discount points tax-deductible?
Yes. The IRS generally allows homeowners to deduct discount points as prepaid mortgage interest on their federal tax return for a primary residence, either fully in the purchase year or amortized over the loan life.
Can seller concessions be used to buy down mortgage points?
Yes. Seller concessions (credits negotiated into the purchase contract) can be used to pay for buyer discount points at closing, lowering your interest rate without requiring extra cash from your pocket.